1. Schloendorff v Society of New York Hospital (1914, USA)

This is one of the earliest and most foundational consent cases.

Facts:

A patient underwent surgery at a hospital and explicitly refused anesthesia. Despite this, doctors proceeded with surgery under anesthesia. The hospital defended the action as medically necessary.

Legal Issue:

Whether a doctor can treat a patient without consent if it is medically beneficial.

Judgment:

The court held that:

• Every competent adult has the right to decide what is done to their body.
• Performing treatment without consent is legally considered battery (unlawful physical interference).

Principle Established:

“Every human being of adult years and sound mind has a right to determine what shall be done with his own body.”

Relevance to Aeromedical Transport:

In air ambulance cases, this principle means:

• A conscious, competent patient can refuse air evacuation even if doctors believe it is life-saving.
• Transport without consent may be legally actionable unless an emergency exception applies.

2. Canterbury v Spence (1972, USA)

This case modernized the doctrine of informed consent.

Facts:

A patient underwent spinal surgery and was not informed of a rare but serious risk (paralysis). The patient later became paralyzed and sued.

Legal Issue:

How much information must a doctor disclose before obtaining consent?

Judgment:

The court held:

• Consent is invalid unless the patient is informed of material risks.
• “Material risk” means risks a reasonable patient would consider significant in deciding.

Principle Established:

• Shift from “doctor-centered disclosure” to patient-centered disclosure.
• Doctors must disclose risks, alternatives, and consequences.

Relevance to Aeromedical Transport:

For air ambulance transfer:

• Patients must be informed of risks such as:
  • cabin pressure effects,
  • turbulence complications,
  • in-flight deterioration risks,
  • delay risks vs ground transport.
• Failure to explain alternatives (ground vs air transport) can invalidate consent.

3. Montgomery v Lanarkshire Health Board (2015, UK)

This UK Supreme Court case is now the leading modern authority on informed consent.

Facts:

A diabetic pregnant woman was not informed of the risk of shoulder dystocia during vaginal birth. The risk was known but not disclosed because doctors believed most diabetic women deliver safely.

Legal Issue:

Whether doctors can decide what risks to disclose based on professional judgment.

Judgment:

The court rejected the old paternalistic standard and ruled:

• Doctors must disclose any risk that a reasonable patient would find significant, or that the doctor knows this particular patient would consider significant.

Principle Established:

• Consent is about patient autonomy, not medical discretion alone.

Relevance to Aeromedical Transport:

In aeromedical evacuation:

• A doctor cannot decide alone that “air transport is best” without discussing:
  • patient fears (e.g., claustrophobia, altitude anxiety),
  • religious or personal objections,
  • alternative transport methods,
  • financial implications if relevant.
• Consent must be individualized, not standardized.

4. Samira Kohli v Dr. Prabha Manchanda (2008, Supreme Court of India)

A landmark Indian case on surgical consent limits.

Facts:

A patient consented to diagnostic laparoscopy and hysteroscopy. While under anesthesia, doctors performed a full hysterectomy without prior consent, claiming it was necessary.

Legal Issue:

Whether consent for one procedure extends to a more extensive procedure.

Judgment:

The Supreme Court held:

• Consent must be specific and procedure-bound.
• Performing an additional major procedure without consent is unlawful unless:
  • it is a life-saving emergency, and
  • obtaining consent is impossible.

Principle Established:

• “Informed consent is procedure-specific, not general.”

Relevance to Aeromedical Transport:

This case is highly relevant because:

• Consent for “medical evacuation” does NOT automatically mean consent for:
  • air transport,
  • ICU-level aeromedical care,
  • invasive in-flight interventions.
• Each component (especially high-risk air evacuation) may require explicit consent unless emergency doctrine applies.

5. Parmanand Katara v Union of India (1989, Supreme Court of India)

A foundational case on emergency medical treatment duties.

Facts:

A person injured in a road accident was refused immediate treatment by a hospital because police formalities were not completed.

Legal Issue:

Whether hospitals can delay emergency treatment due to procedural/legal formalities.

Judgment:

The Supreme Court held:

• Preservation of life is the highest legal and constitutional priority.
• Doctors must provide emergency care immediately.
• Legal procedures cannot delay life-saving treatment.

Principle Established:

• Duty to save life overrides procedural barriers.

Relevance to Aeromedical Transport:

In aeromedical evacuation:

• If a patient is unconscious or critically unstable:
  • consent may be implied in law for emergency air evacuation.
• If delay in obtaining consent risks death:
  • transport can proceed under emergency doctrine.
• However, once the patient regains capacity, continued treatment must be re-evaluated.

Overall Legal Principles in Aeromedical Transport Consent

From these cases, courts generally derive these rules:

1. Autonomy is primary

A competent patient can refuse air transport even if it risks death.

2. Consent must be informed and specific

Risks of flight, alternatives, and consequences must be explained.

3. Emergency exception exists

If delay threatens life and consent is impossible, implied consent applies.

4. Scope matters

Consent for treatment does not automatically include consent for air evacuation or additional procedures.

5. Documentation is critical

Especially in aeromedical transport, failure to document consent discussions creates legal liability.